This manual covers General Motors (GM) Light Trucks, including Chevrolet C/K Series (C10, C20, C30, K10, K20, K30), GMC Sierra/Custom/Heavy Duty (C15, C25, C35, K15, K25, K35), Chevrolet/GMC Blazer/Jimmy, and Chevrolet/GMC Suburban models. These vehicles, often referred to by their individual model designations such as the 1973-1977 C/K, represent a significant generation of durable and capable light-duty pickup trucks, vans, and SUVs built for the North American market. Known for their robust engineering and longevity, these GM trucks have established a strong legacy and a dedicated following among restorers, hobbyists, and independent repair shops. Their design emphasized practicality and utility, making them popular choices for a wide range of tasks.

This Illustration and Parts Manual provides essential visual and part number reference information crucial for the identification, maintenance, and repair of these vehicles. It features extensive exploded view diagrams for component identification and assembly order, along with comprehensive GM part numbers for all listed components. The manual covers key systems including engine, drivetrain, chassis, suspension, steering, braking, electrical, and body and interior components. While it focuses on parts identification and sourcing, it serves as a vital resource for owners and technicians to accurately identify and order replacement parts, ensuring the continued operational integrity and restoration of these classic GM trucks.